JP2023052267A - Method, base station, and user equipment for selecting set of beam to be monitor by ue - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method, a base station (BS), and user equipment (UE) that select beams to be monitored by the UE to reduce overhead signaling in a telecommunication network.

SOLUTION: The method according to the invention, with a telecommunication network 101 including a base station function 102 connected to access nodes (AN) 104, 105 serving UE, comprises the steps of: receiving measurement data including measurement values of qualities of beams 106, 107, 108 observed by the UE; retrieving at least one measurement data from particular UE that matches the received measurement data, in a historical database including historical measurement data comprising measurement values of the qualities of beams observed by the UE in the telecommunication network over time; selecting a set of beams to be monitored by the UE based on the retrieved at least one measurement data from the particular UE and based on subsequent measurement data of the particular UE over time in the historical database; and transmitting the selected set of beams to be monitored to the UE.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates generally to selecting a set of beams to be monitored, and more particularly to selecting beams based on historical measurements of beam quality previously observed by user equipment.

Extreme High Frequency (EHF) is an International Telecommunications Union (ITU) designation for a band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz (GHz). Radio waves in this band have wavelengths from 10 to 1 millimeter and this band is given the name millimeter band or millimeter wave, sometimes abbreviated MMW or mmW.

These frequency bands are envisioned to be used because the corresponding spectrum is less occupied compared to frequently used frequency bands, eg, below 6 GHz, thereby improving system capacity. Propagation effects, however, are severe in these frequency bands. For example, signal quality may degrade rapidly with distance, eg diffraction, penetration and/or reflection losses may increase.

One of the proposed advances in this area is the use of narrow beams and highly directional beamforming using very large antenna arrays, namely massive multiple-input multiple-output (MIMO) antennas.

Beamforming or spatial filtering is a signal processing technique used in arrays for directional signal transmission or reception. This is accomplished by combining the elements in the antenna array so that signals at certain angles experience constructive interference and other signals experience destructive interference. Beamforming may be used at both the transmit and receive ends to achieve spatial selectivity. The improvement compared to omnidirectional receive/transmit is known as array directivity.

In accordance with the above, the measurement and reporting of multiple narrow beams, or simply beam management, allows an access node (AN) to measure the signal quality experienced, e.g. It may be advantageous if handled efficiently so that it can be kept above the threshold.

For the next generation of radio technology, i.e. 5G New Radio (NR), 3GPP has stated that the intra/inter AN beam switch procedure can use a smaller set of beams compared to the joint beam space. Note that we have briefly described a set of procedures to beam management that indicate .

Long Term Evolution (LTE) does not support massive MIMO antennas nor mm-wave bands. Therefore, the LTE solution only supports management of the entire beam space. Using such a solution to manage several narrow beams would greatly increase the signaling load.

Currently deployed solutions are based on beam training. That is, the beam, or set of beams, to be used for transmission is determined based on UE measurements of previously selected beams. These measurements, for example, can be outdated, which can cause spatial misalignments that can lead to beam failure.

It is an object to provide a method for selecting beams to be monitored by a user equipment (UE), thereby reducing overhead signaling in telecommunication networks, among other things.

It is another object to provide base station functionality, user equipment (UE), and non-transitory computer-readable storage media included within the presented method.

In a first aspect, a method is provided for selecting a set of beams to be monitored by a user equipment (UE) in a telecommunications network, said telecommunications network comprising at least one access node (AN) serving said UE. ) with a base station (BS) function connected to it.

The method comprises receiving, by the BS function, from the UE measurement data comprising measurements of quality of beams observed by the UE, wherein the beams are transmitted from the at least one AN to the UE. and retrieving, by the BS function, at least one measurement data from a particular UE that matches the received measurement data in a history database, wherein the history database is , historical measurement data comprising measurements of beam quality observed by UEs in said telecommunications network over time; selecting a set of beams to be monitored by said UE based on said retrieved at least one measurement data and based on subsequent measurement data of said particular UE over time in said historical database; and transmitting, by the BS function, the selected set of beams to be monitored to the UE.

The method is based at least on the insight that historical measurements can be taken into account when the UE decides which beams to monitor. The history database may be initially empty and filled during runtime. Accordingly, measurements related to beam quality observed by the UE may be stored in a historical database, and the relationship in time between those measurements may also be stored. The above involves the database comprising measurements of beam quality observed by the UE over time.

One of the advantages of the method described above is that a high quality beam is more likely to be selected for the UE as the selection process is based on previous measurements. Even previous measurements may relate to the same UE. This allows the selection process to take into account the motion propensity of a particular UE.

For example, it may be detected that a particular UE moves between two geographic locations often, ie, once a day, once a week, and so on. Such trends can be detected in historical databases. Patterns in previous measurements for that particular UE may reflect such trends, and these patterns may be detected and used to select beams to be monitored. Therefore, the BS function is able to properly estimate the beam that should be used for that particular UE.

Note that according to this disclosure, the beams may originate from massive multiple-input multiple-output (MIMO) transmission techniques. Each access node (AN) may be equipped with multiple array antennas and/or multiple antennas for directional purposes.

Massive MIMO, for example, may involve systems using antenna arrays with hundreds of antennas serving tens of UEs simultaneously on the same time-frequency resources. A fundamental aspect of Massive MIMO is to enjoy all the benefits of conventional MIMO, but on a larger scale.

Each antenna is small and preferably powered via an optical or electrical digital bus. Massive MIMO relies on spatial multiplexing, which in turn relies on the base station, ie, the ability of the base station to have both uplink and downlink channel knowledge. On the uplink, this can be accomplished by having the terminals send pilots, based on which the base station estimates the channel response for each of the terminals.

According to this disclosure, the BS function receives measurement data comprising measurements of beam quality observed by the UE. These beams originate from at least one access node. A UE may simultaneously observe beams from multiple access nodes (ANs). These measurements relate to beam quality, such as signal-to-noise ratio.

The BS function then retrieves at least one measurement data from the particular UE that matches the received measurement data in the history database. This means that the function searches the database for historical measurement data that most closely resembles the received measurement data. For example, the received measurement data may indicate a particular order of beams, the beams being ordered by their measured quality. The beam with the highest quality is placed first, the beam with the second highest quality is placed second, and so on. The BS function then searches the historical database for measurement data with the same or similar order of beams.

The retrieved measurement data is associated with subsequent measurement data in the history database. Historical measurement data relates to measurements made by a particular UE at a time T1. That same particular UE made another measurement at a subsequent time T2. The corresponding measurement data of this subsequent measurement is associated with the retrieved measurement data in the history database. The corresponding measurement data are then used for selection purposes. That is, the BS function selects the set of beams to be monitored by the UE from the corresponding measurement data.

In a final step, the selected set of beams to be monitored are transmitted to the UE.

According to this disclosure, BS functionality may be implemented in base stations, network nodes, clouds, and the like.

According to this disclosure, measurements may be performed on longer timescales, eg, 50-100 ms, such as averaged over one radio frame or multiple radio frames. However, the examples described herein are also applicable to traffic measurements performed on shorter timescales, such as on a symbol, timeslot or subframe basis, or even on shorter timescales.

A selected set of beams may also be used by the BS function for specific radio operation tasks. Radio operation tasks include, for example, cell change between two cells, scheduling or resource allocation, load balancing, network planning or adjusting network parameters, controlling uplink and/or downlink power, avoiding interference and/or Either to mitigate.

The BS function is activated in the following manner: periodically, on an event-triggered basis, e.g. when a certain measurement exceeds or falls below a threshold, and upon request sent by the BS function to the UE. Measurement data may be received from the UE in any one or more of the responses.

One of the advantages of the presented method is that the control channel between UE and access node is eliminated. That is, compared to the prior art, the UE is presented with a set of beams to be monitored, which is a subset of all beams available for the UE to be monitored. Therefore, the control channel need only be used to exchange information for that particular subset of beams.

Another advantage is that the UE does not have to monitor all beams available for the UE to be monitored. A UE is presented with a subset of beams. This received unnecessary processing power by the UE.

In one example, received measurement data comprising measurements of quality of beams observed by the UE are:
- the signal-to-noise ratio for each of said beams,
- a received signal strength indicator (RSSI) for each of said beams;
- the reference signal received power (RSRP) for each of said beams;
- Reference Signal Received Quality (RSRQ) for each of said beams,
Prepare.

In another example, the method further comprises:
- storing, by the BS function, the received measurement data in the history database;

The advantage of this example is that the history database is fully filled. As mentioned above, the history database may initially be empty. The history database can then be filled with all kinds of measurement data generated by UEs present in the telecommunications network. An increase in the amount of measurement data present in the historical database increases the likelihood that the received measurement data will match any of the historical measurement data present in the database.

In a further example, the method further comprises:
- by said BS function, said UE based on said retrieved at least one measurement data from said particular UE and based on subsequent measurement data of said particular UE over time in said historical database; is to be handed over to a different AN in said telecommunications network;
- performing, by said BS function, a handover of said UE to said determined different AN in said telecommunication network;

In a further example, said transmitting, by said BS function, said selected set of beams to be monitored to said UE comprises:
- further comprising, by said BS function, sending a frequency parameter indicating to said UE how many measurements on said selected set of beams should be performed by said UE;

Here, the BS function decided how often measurements should be performed by the UE.

In a second aspect of the present disclosure, a method is provided for monitoring, by a user equipment (UE), a set of beams in a telecommunications network served by an access node (AN), said method comprising:
- receiving, by the UE, a set of beams to be monitored;
- measuring, by the UE, the quality of the received set of beams to be monitored;
- selecting, by the UE, a subset of the set of beams based on the measured quality of the received set of beams;
- sending by the UE to the AN measurement data comprising measurements of the quality of the subset of beams;

Expressions of different aspects provided by the methods and devices according to the present disclosure, ie terminology, should not be taken literally. The wording of the aspects is chosen merely to accurately express the rationale behind the actual functioning of the aspects.

According to the present disclosure, different aspects applicable to the above examples of the method, including advantages thereof, correspond to aspects applicable to base stations as well as user equipment.

In a third aspect, in a telecommunications network, there is provided a network node, e.g. a base station (BS), configured for selecting a set of beams to be monitored by a user equipment (UE), said BS comprising said connected to at least one access node (AN) serving a UE, the BS comprising:
- a receiving device configured to receive from the UE measurement data comprising measurements of the quality of beams observed by the UE, wherein the beams are from the at least one AN to the UE; a receiving device originating from at least another AN in the telecommunications network to the UE;
- a retrieval device configured to retrieve at least one measurement data from a particular UE that matches the received measurement data in a history database, the history database over time in said telecommunications network; a retrieval device comprising historical measurement data comprising beam quality measurements observed by the UE;
- to be monitored by the UE based on the retrieved at least one measurement data from the specific UE and based on subsequent measurement data of the specific UE over time in the history database a selection device configured to select a set of beams;
- transmitting equipment configured to transmit the selected set of beams to be monitored to the UE;

In one example, the received measurement data comprising measurements of beam quality observed by the UE are:
- a signal-to-noise ratio for each of said beams;
- a received signal strength indicator (RSSI) for each of said beams;
- a reference signal received power (RSRP) for each of said beams;
- Reference Signal Received Quality (RSRQ) for each of said beams.

In a further example, the BS is
- further comprising a storage device configured to store said received measurement data in said history database;

In yet another example, the BS is
- based on said retrieved at least one measurement data from said specific UE and based on subsequent measurement data of said specific UE over time in said historical database, said UE and for performing handover of said UE to said determined different AN in said telecommunications network.

In one example, the transmitting device is further configured to: transmit a frequency parameter indicating to said UE how many measurements should be performed by said UE on said selected set of beams.

In a fourth aspect, there is provided User Equipment (UE) configured for monitoring a set of beams in a telecommunications network, said UE being configured to be served by an access node in said telecommunications network. , the UE is
- a receiving device configured to receive a set of beams to be monitored;
- a measuring instrument configured to measure the quality of said received set of beams to be monitored;
- a selection device configured to select a subset of said set of beams based on said measured quality of said received set of beams;
- transmitting equipment configured to transmit measurement data comprising measurements of the quality of said subset of beams to said AN.

In a fifth aspect, in a telecommunications network, a base station (BS) is provided for selecting a set of beams to be monitored by a user equipment (UE), said BS having at least one beam serving said UE. connected to an access node (AN), said BS:
- a receiving module for receiving measurement data from said UE comprising measurements of the quality of beams observed by said UE, said beams originating from said at least one AN to said UE, said a receiving module originating from at least another AN in a telecommunications network to said UE;
- a retrieval module for retrieving at least one measurement data from a particular UE matching the received measurement data in a history database, the history database being observed by UEs in said telecommunication network over time; an extraction module comprising historical measurement data comprising measurements of the quality of the beam that has been processed;
- to be monitored by the UE based on the retrieved at least one measurement data from the specific UE and based on subsequent measurement data of the specific UE over time in the history database a selection module for selecting a set of beams;
- a transmission module for transmitting the selected set of beams to be monitored to the UE;

In a sixth aspect, there is provided a user equipment (UE) for monitoring a set of beams in a telecommunications network, said UE being configured to be served by an access node in said telecommunications network, said UE teeth,
- a receiving module for receiving a set of beams to be monitored;
- a measurement module for measuring the quality of said received set of beams to be monitored;
- a selection module for selecting a subset of said set of beams based on said measured quality of said received set of beams;
- a transmission module for transmitting measurement data comprising measurements of the quality of said subset of beams to said AN;

In a seventh aspect, a computer program product comprising a readable storage medium comprising instructions that, when executed on at least one processor, cause the at least one processor to perform a method according to any of the examples given above. is provided.

The above and other features and advantages of the present disclosure will be best understood from the following description with reference to the accompanying drawings. In the drawings, like reference numbers indicate equivalent parts or parts that perform equivalent or comparable functions or operations.

FIG. 2 shows an example of how measurement data may be obtained by a user equipment (UE); FIG. 3 shows an example of a diagram displaying basic aspects of the present disclosure; 1 illustrates part of a telecommunications network according to the present disclosure; FIG. FIG. 4 is a diagram showing a structure in which measurement data is stored in a history database; FIG. 2 illustrates an example method according to the present disclosure; FIG. 3 illustrates another example of a method according to this disclosure; [0014] Figure 3 illustrates an example of base station functionality in accordance with the present disclosure; FIG. 2 illustrates an example of user equipment in accordance with this disclosure;

FIG. 1 shows an example 1 of how measurement data can be obtained by a user equipment (UE). This Example 1 is described with respect to selecting the set of beams to be monitored for a particular UE.

A beam selection procedure for beam tracking can be described as follows. A base station (BS) function serving a particular UE has a set of beams from at least one directly connected access node (AN) and another set of beams from at least one AN belonging to one neighbor BS. to determine. The serving BS uses the UE's available historical statistics and the reliance on measured data.

In this example, when the served UE reports measurement data to its serving BS for a fraction of the beams, say M, received above some predefined threshold, the served UE measures the quality of the received signal for every determined beam for a number of possible measurement times within a determined time period T', e.g., a determined beam reporting period T≥T' .

The number of beams that can be monitored by the UE can be greater than the amount of feedback the UE is able to report to the BS function, ie M. During the measurement period T', the UE may store all kinds of quality values of detected and decoded beams for all beams in the determined set. At the end of T', the UE may select the M beams to be reported, which are the beams with the highest signal quality during the measured time T'. In the current scenario, M is fixed and depends on UE capabilities.

FIG. 1 shows the monitored beams, six beams as illustrated by AN2a, AN2b and AN1b. Furthermore, M=3 and T' comprises 5 time slots. The UE may memorize all values, and after T', the UE may select the three highest values that the UE can find in the table, e.g., as indicated by the stars in the grid. The UE then reports the corresponding measurement data, i.e. beam quality, to the BS for the entire time T'. Other means of choosing the highest value of M are also possible. For example, the UE may select the M highest values after preprocessing, eg, time averaging, of all stored values.

A serving BS function receives measurement data from its served UEs. The BS function then searches in the historical database for the number of samples that are most likely or most similar to the received measured measurement data, ie the measurement data. An estimate of the metric value associated with the measured data can then be obtained based on the most similar samples for several hours ahead and for all relevant beams. By using the estimated metric values, the serving BS function can determine the set of beams from its AN that give the UE improved spatial alignment for some time in the future.

This may result in intra-BS beam handover, for example. Further, also based on the estimated metric values, the serving BS determines another set of beams from at least the neighbor BS's AN that can potentially provide the best spatial alignment to its served UE. obtain. This may also result in inter-BS beam handover. Further, the serving BS may determine the values of T', T and select M. Finally, the serving BS informs its served UEs of the set of selected beams to be monitored and the determined parameter values.

FIG. 2 shows an example of FIG. 51 displaying basic aspects of the present disclosure.

FIG. 52 provides a basic overview of the steps taken according to this disclosure. Beam measurements are performed by UE 112 and those beam measurements are provided 302 to base station function 102 .

The base station function 102 may store 52 these measurements, or measurement data, in a historical database for further use. Additionally, the base station function 102 retrieves at least one measurement data from the same historical database, where the at least one measurement data best matches the measurement data received from the UE 112 . Based on the retrieved measurement data, the base station function 112 selects 304 specific beams on which the UE 112 should perform measurements during subsequent time periods. The selected beam is provided 305 to UE 112 .

Communication between UE 112 and base station function 102 is provided over the air interface, ie, wirelessly. Generally, control channel messages over control channels are utilized. Reducing the amount of beams for which UE 112 has to perform quality measurements also reduces the amount of signaling between UE 112 and base station function 102 . This therefore improves the efficiency of the telecommunications network.

Also note that the selected set of beams is provided to UE 112 . In practice, it may be the identifier of the selected beam that is provided to the UE 112 rather than the beam itself. Therefore, transmitting the set of beams may be interpreted as transmitting the identity of the selected beam to UE 112 .

FIG. 3 illustrates a portion of telecommunications network 101 according to the present disclosure.

The telecommunications network 101 comprises two base stations 103, 111, the first base station 103 has two access nodes (AN) 104, 105 and the second base station 111 has another two ANs 109, 110. have

A base station (BS) function 102 is provided and configured to perform beam management for UE tracking. Note that the BS function 102 may be implemented in the base stations 103, 111 or any other node in the telecommunications network. The BS function 102 may be provided as cloud serving and processing is performed in the cloud.

Here, a user equipment (UE) 112 configured to travel a particular trajectory 113 is shown. One of the aspects of this disclosure is that the trajectory may be estimated based on previous measurements performed by the same or any other UE. In this particular scenario, UE 112 is configured to monitor six beams 106,107,108. A beam referenced 106 originates from the AN referenced 105 . A beam referenced 107 originates from an AN referenced 110 . A beam referenced 108 originates from an AN referenced 109 .

UE 112 monitors each of these beams 106, 107, 108 for a predefined time period, eg, for multiple timeslots or multiple symbols. This means that the UE 112 can perform quality measurements on those beams 106,107,108. The UE 112 thus generates measurement data, which relate to the quality of the monitored/measured beams 106,107,108.

According to this disclosure, beam quality may be measured in terms of signal-to-noise ratio or any other type of measurement. Further, measurements on the quality of beams 106, 107, 108 may be performed in parallel, substantially in parallel, or following each other.

UE 112 may then select a subset of monitored beams 106 , 107 , 108 . In this particular example, the UE may select beams as referenced by reference number 106 . Alternatively, UE 112 may provide all measurement data, i.e., measurement data from all six beams 106, 107, 108, to AN 105, which UE 112 communicates with the base station via AN 105, as indicated by reference numeral 103. connected to

BS function 102 then retrieves at least one measurement data from the particular UE that matches the measurement data from UE 112 in historical database 114 . The historical database 114 comprises historical measurement data comprising measurements of beam quality observed by UEs in the telecommunications network over time.

Accordingly, measurement data provided by UEs in the telecommunications network may be stored in history database 114 . The measurement data may be given a timestamp or any other metadata that indicates the moment when the corresponding measurement was made. This allows patterns to be detected in the historical database. The measurement data may be correlated to each other based on given timestamps and, for example, based on the identity of the UE that made those particular corresponding measurements.

The BS function 102 is then monitored by the UE 112 based on at least one measurement data retrieved from the particular UE and based on the particular UE's subsequent measurement data over time in the historical database. Select a set of power beams.

In this particular scenario, trajectory 113 may be estimated based on previous measurements of that particular UE stored in history database 114 . The specific information may be used to initiate a handover of the UE 112 within the telecommunications network, eg, an intra-BS handover or an inter-BS handover.

FIG. 4 shows the structure in which measurement data is stored in the history database.

The stored measurement data can be conceptually visualized as stored data using three dimensions 202, 203, 204. FIG. The first dimension, ie, as indicated by reference numeral 202, relates to beam identification. The second dimension, ie, as indicated by reference numeral 203, relates to sample identification. The third dimension, ie, as indicated by reference numeral 204, relates to time.

According to this disclosure, the BS function retrieves at least one measurement data from a particular UE that matches the received measurement data. This can be achieved as follows.

The BS function may select one or more slices of the historical database, which are created in the data structure 201 in the plane defined by the dimensions indicated by reference numerals 202 and 204. FIG. A particular slice therefore covers a single sample, ie a measurement made by a particular UE.

Each of the slices comprises measurement data, ie respective beam quality measurements and an indication of when those measurements were performed. The BS function may thus select one or more of the slices that most closely resemble the received measurement data, ie the actual measurements performed by the UE.

Based on the selected slice, the BS function may select the beam with the highest signal-to-noise ratio at a previous time, ie, a subsequent time frame in that same slice.

FIG. 5 illustrates an example method 301 according to this disclosure.

Method 301 is directed to selecting a set of beams to be monitored by a user equipment (UE) in a telecommunications network, said telecommunications network being connected to at least one access node (AN) serving said UE. base station (BS) functionality.

The method includes a step of receiving 302, by the BS function, from the UE measurement data comprising measurements of the quality of beams observed by the UE, the beams being transmitted from the at least one AN to the UE. to the UE from at least another AN in the telecommunications network.

The above involves the UE performing quality measurements on the beams that the UE is requested to monitor. These measurements, or a subset thereof, are provided to the BS function using measurement data.

In a next step, the BS function retrieves 303 at least one measurement data from a particular UE that matches the received measurement data in a history database, the history database is a collection of UEs in said telecommunication network over time. historical measurement data comprising measurements of the quality of the beam observed by;

According to this disclosure, matching means that the BS function finds the historical measurement data in the historical database that best matches the received measurement data. The historical measurement data following the matched historical measurement data may then be used by the BS function to select the set of beams to be monitored by the UE as described below.

Therefore, in a next step, the BS function is configured based on said retrieved at least one measurement data from said specific UE and on subsequent measurement data of said specific UE over time in said historical database. based, select 304 a set of beams to be monitored by the UE. Therefore, the BS function may be able to perform an educated guess about the beams that may be important to the UE, ie the beams that may have the highest quality for the UE.

In a final step, the BS function transmits the selected set of beams to be monitored to the UE.

FIG. 6 illustrates another example method 401 according to this disclosure.

Method 401 is directed to monitoring a set of beams by a user equipment (UE) in a telecommunications network served by an access node (AN).

The method is
receiving 402 a set of beams to be monitored by the UE;
measuring 403 the quality of the received set of beams to be monitored by the UE;
selecting 404, by the UE, a subset of the set of beams based on the measured quality of the received set of beams;
sending 405 by the UE measurement data comprising measurements of the quality of the subset of beams to the AN.

FIG. 7 shows an example of base station functionality 501 according to this disclosure.

Here, base station functions 501 are described with respect to a particular base station. However, it should be noted that the base station functionality 501 may be provided in any network node, such as a serving running in a cloud, distributed among the network nodes.

A base station function 501 is configured for selecting a set of beams to be monitored by a user equipment (UE) in a telecommunications network, said BS being connected to at least one access node (AN) serving said UE. configured to be connected to

BS function 501 comprises a receiving device 502 configured to receive measurement data from said UE comprising measurements of the quality of beams observed by said UE, said beams from said at least one AN to said Occurs to the UE.

The BS function 501 further comprises a retrieval device 505 configured for retrieving at least one measurement data from a particular UE matching the received measurement data in a history database, the history database storing said Historical measurement data comprising measurements of beam quality observed by UEs in the telecommunications network.

Based on the retrieved at least one measurement data from the particular UE and based on subsequent measurement data of the particular UE over time in the historical database, a BS function 501 is configured by the UE to Further comprising a selection device 504 configured to select a set of beams to be monitored.

BS function 501 further comprises transmitting equipment 509 configured to transmit said selected set of beams to be monitored to said UE.

The BS function 501 comprises a control unit 507 and a memory 506 , the control unit 507 being connected to a retrieval device 505 , a selection device 504 , a receiving device 502 and a transmitting device 509 .

Incoming data packets or messages pass through input terminal 503 before they reach receiving device 502, or receiving module. Outgoing data packets or messages are sent through or by a transmitting device 509 or module via output terminal 508 .

FIG. 8 shows an example of user equipment 601 according to this disclosure.

User Equipment (UE) 601 is configured to monitor a set of beams in a telecommunications network, said UE being configured to be served by an access node in said telecommunications network. The UE is
- a receiver device 602 configured to receive the set of beams to be monitored;
- a measuring instrument 605 configured to measure the quality of said received set of beams to be monitored;
- a selection device 604 configured to select a subset of said set of beams based on said measured quality of said received set of beams;
- a transmitter device 609 configured to transmit measurement data comprising measurements of the quality of said subset of beams to said AN;

The UE 601 comprises a control unit 607 and a memory 606 , the control unit 607 being connected to the receiving equipment 602 , the selecting equipment 604 , the measuring equipment 605 and the transmitting equipment 609 .

Incoming data packets or messages pass through input terminal 603 before they reach receiving device 602, or receiving module. Outgoing data packets or messages are sent through or by a transmitter device 609 or module via output terminal 608 .

The present invention is not limited to the embodiments disclosed above, but may be modified and improved by those skilled in the art beyond the scope of the invention disclosed in the appended claims without the need to apply inventive skill. can be

Claims (15)

A method for selecting a set of beams to be monitored by a user equipment (UE) (112, 601) in a telecommunications network, said telecommunications network providing at least one beam serving said UE (112, 601). comprising a base station (BS) function connected to an access node (AN), the method comprising:
receiving (302), by said BS function (102), from said UE (112, 601) measurement data comprising measurements of beam quality observed by said UE (112, 601); Receiving measurement data beams originating from said at least one AN to said UE (112, 601) and originating from at least another AN in said telecommunications network to said UE (112, 601). (302);
retrieving (303) by said BS function (102) at least one measurement data from a particular UE (112, 601) matching said received measurement data in a historical database (114), said A historical database (114) retrieves (303) at least one measurement data comprising historical measurement data comprising measurements of beam quality observed by UEs (112, 601) in said telecommunication network over time. ) step and
By said BS function (102), based on said retrieved at least one measurement data from said particular UE (112, 601) and over time in said historical database (114) said particular UE ( selecting (304) a set of beams to be monitored by said UE (112, 601) based on subsequent measurement data of said UE (112, 601);
transmitting (305), by said BS function (102), said selected set of beams to be monitored to said UE (112, 601). the received measurement data comprising measurements of beam quality observed by the UE (112, 601);
a signal-to-noise ratio for each of said beams;
a received signal strength indicator (RSSI) for each of said beams;
a reference signal received power (RSRP) for each of said beams;
and a reference signal received quality (RSRQ) for each of said beams. 3. The method of claim 1 or 2, wherein the method further comprises storing, by the BS function (102), the received measurement data in the history database (114). said method comprising:
By said BS function (102), based on said retrieved at least one measurement data from said particular UE (112, 601) and over time in said historical database (114) said particular UE ( 112, 601), determining that said UE (112, 601) should be handed over to a different AN in said telecommunication network;
performing, by said BS function (102), a handover of said UE (112, 601) to said determined different AN in said telecommunication network. The method described in . said step of transmitting, by said BS function (102), said selected set of beams to be monitored to said UE (112, 601);
Sending, by said BS function (102), a frequency parameter indicating to said UE (112, 601) how many measurements on said selected set of beams should be performed by said UE (112, 601). 5. The method of any one of claims 1-4, further comprising: A method of monitoring a set of beams by a user equipment (UE) (112, 601) in a telecommunications network served by an access node (AN), said method comprising:
receiving a set of beams to be monitored by said UE (112, 601);
measuring the quality of the received set of beams to be monitored by the UE (112, 601);
selecting, by said UE (112, 601), a subset of said set of beams based on said measured quality of said received set of beams;
transmitting by said UE (112, 601) measurement data comprising measurements of the quality of said subset of beams to said AN. A base station (BS) configured to select a set of beams to be monitored by a user equipment (UE) (112, 601) in a telecommunications network, said BS comprising: ), the BS is connected to at least one access node (AN) serving a
A receiving device (502) configured to receive from said UE (112, 601) measurement data comprising measurements of the quality of beams observed by said UE (112, 601), wherein said beam is , a receiving equipment (502) originating from said at least one AN to said UE (112,601) and from at least another AN in said telecommunications network to said UE (112,601); ,
a retrieval device (505) configured to retrieve at least one measurement data from a particular UE (112, 601) matching said received measurement data in a history database (114), said history database; a retrieval device (505) (114) comprising historical measurement data comprising measurements of beam quality observed by UEs (112, 601) in said telecommunications network over time;
subsequent measurements of said particular UE (112, 601) based on said retrieved at least one measurement data from said particular UE (112, 601) and over time in said historical database (114); a selection device (504) configured to select a set of beams to be monitored by said UE (112, 601) based on data;
a transmitting equipment (509) configured to transmit said selected set of beams to be monitored to said UE (112, 601). the received measurement data comprising measurements of beam quality observed by the UE (112, 601);
a signal-to-noise ratio for each of said beams;
a received signal strength indicator (RSSI) for each of said beams;
a reference signal received power (RSRP) for each of said beams;
Reference Signal Received Quality (RSRQ) for each of said beams. The BS is
9. The BS of claim 7 or 8, further comprising a storage device configured to store said received measurement data in said history database (114). The BS is
subsequent measurements of said particular UE (112, 601) based on said retrieved at least one measurement data from said particular UE (112, 601) and over time in said historical database (114); for determining, based on data, that said UE (112, 601) should be handed over to a different AN in said telecommunications network, and said UE to said determined different AN in said telecommunications network. 10. The BS according to any one of claims 7 to 9, further comprising processing equipment configured to perform a handover of (112, 601). The transmitting device is further configured for: transmitting a frequency parameter indicating to the UE (112, 601) how many measurements for the selected set of beams should be performed by the UE (112, 601). 11. The BS according to any one of claims 7-10, wherein the BS. A User Equipment (UE) (112, 601) configured for monitoring a set of beams in a telecommunications network, said UE (112, 601) being served by an access node in said telecommunications network. and the UE (112, 601) is configured to:
a receiver device (602) configured to receive a set of beams to be monitored;
a measuring instrument (605) configured to measure the quality of said received set of beams to be monitored;
a selection device (604) configured to select a subset of the set of beams based on the measured quality of the received set of beams;
a transmitting equipment (609) configured to transmit measurement data comprising measurements of quality of said subset of beams to said AN. A base station (BS) for selecting a set of beams to be monitored by a user equipment (UE) (112, 601) in a telecommunications network, said BS serving said UE (112, 601). connected to at least one access node (AN) to which the BS is:
a receiving module for receiving measurement data from said UE (112, 601) comprising measurements of the quality of beams observed by said UE (112, 601), wherein said beam is aligned with said at least one AN; to said UE (112, 601) from and from at least another AN in said telecommunications network to said UE (112, 601);
a retrieving module for retrieving at least one measurement data from a particular UE (112, 601) matching said received measurement data in a history database (114), wherein said history database (114) is a retrieval module comprising historical measurement data comprising measurements of beam quality observed by UEs (112, 601) in said telecommunications network over time;
subsequent measurements of said particular UE (112, 601) based on said retrieved at least one measurement data from said particular UE (112, 601) and over time in said historical database (114); a selection module for selecting a set of beams to be monitored by said UE (112, 601) based on data;
a transmitting module for transmitting said selected set of beams to be monitored to said UE (112, 601). A User Equipment (UE) (112, 601) for monitoring a set of beams in a telecommunications network, said UE (112, 601) being configured to be served by an access node in said telecommunications network. and the UE (112, 601)
a receiving module for receiving a set of beams to be monitored;
a measurement module for measuring the quality of the received set of beams to be monitored;
a selection module for selecting a subset of the set of beams based on the measured quality of the received set of beams;
and a transmission module for transmitting measurement data comprising measurements of the quality of the subset of beams to the AN. A computer program product comprising a readable storage medium comprising instructions which, when executed on at least one processor, cause said at least one processor to perform the method of any one of claims 1 to 6.

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